Mẹ tôi đang chuẩn bị bữa tối trong bếp.

In Vietnamese, possessive relationships usually go noun + possessor.

So:

• mẹ tôi = my mother
• literally: mother I

This is different from English, where my comes before the noun.

You can also say mẹ của tôi, where của marks possession more explicitly, but mẹ tôi is shorter and more natural in everyday speech.

Đang marks an action as in progress, similar to English am/is/are ... -ing.

So:

• Mẹ tôi chuẩn bị bữa tối = My mother prepares / is preparing dinner depending on context
• Mẹ tôi đang chuẩn bị bữa tối = My mother is preparing dinner right now

It does not work exactly like English be + -ing, but it often corresponds to that meaning.

Here, chuẩn bị functions as a compound verb meaning to prepare.

Even though it is written as two syllables with a space, Vietnamese writing often separates syllables, not whole “words” in the English sense. So learners often need to think in terms of multi-syllable vocabulary items.

In this sentence:

• chuẩn bị = prepare
• bữa tối = the thing being prepared

So the structure is:

• đang chuẩn bị bữa tối = is preparing dinner

Bữa tối specifically means the evening meal / dinner.

Breakdown:

• bữa = meal
• tối = evening

So bữa tối literally means evening meal.

If you said only tối, that would usually mean evening/tonight, not dinner.
So bữa tối is the clearer and more natural choice here.

Vietnamese often places location phrases after the verb phrase or after the object.

So this order is very natural:

• Mẹ tôi / đang chuẩn bị / bữa tối / trong bếp
• My mother / is preparing / dinner / in the kitchen

The location trong bếp tells where the action is happening.

You could move things around in some contexts, but this sentence order is standard and natural.

Trong bếp means in the kitchen.

Breakdown:

• trong = in, inside
• bếp = kitchen

So:

• trong bếp = in the kitchen

Note that bếp can sometimes refer to the kitchen area or even the stove/cooking area depending on context, but here it clearly means the kitchen.

Yes, you can.

• Mẹ tôi đang chuẩn bị bữa tối trong bếp.
  = My mother is preparing dinner in the kitchen.
• Mẹ tôi chuẩn bị bữa tối trong bếp.
  = My mother prepares dinner in the kitchen or My mother is preparing dinner in the kitchen, depending on context

Vietnamese often relies on context more than English does.
Adding đang makes the “right now / ongoing action” meaning clearer.

Yes, grammatically you can say mẹ của tôi.

But in everyday Vietnamese, mẹ tôi is usually more natural and common.

Compare:

• mẹ tôi = natural, concise
• mẹ của tôi = correct, but a bit more explicit or heavier

Learners often overuse của because they expect a word like of or a possessive marker. In many simple noun phrases, Vietnamese does not need it.

A useful breakdown is:

• Mẹ tôi = subject
• đang chuẩn bị = verb phrase
• bữa tối = object
• trong bếp = location phrase

So the overall pattern is:

• Subject + aspect marker + verb + object + place

This is a very common Vietnamese sentence pattern.

These parts can be difficult for English speakers:

• đang: starts with đ, which is like an English d, not the same as plain d in Vietnamese
• chuẩn: the ch is somewhat like ch in English, but the vowel combination is harder and the tone matters
• bị: has a rising tone
• bữa: this is especially tricky because of the ươ/ữa vowel combination and the tone

A few helpful notes:

• đ = a strong d sound
• plain d in Vietnamese is different from đ
• tones are essential: changing the tone can change the word

If you are practicing pronunciation, it is best to learn:

1. the syllable shape
2. the correct tone
3. the sentence rhythm as a whole

Sometimes, yes, but the meaning is slightly different.

• chuẩn bị bữa tối = prepare dinner
• nấu bữa tối = cook dinner

Chuẩn bị is broader. It can include cooking, setting things out, getting ingredients ready, and so on.
Nấu focuses more specifically on the act of cooking.

So the original sentence is slightly more general than a sentence with nấu.